EFFECT OF TAIL VOID CLOSURE ON GROUND MOVEMENT DURING SHIELD TUNNELLING IN SANDY SOIL

The complete modelling of the tunnelling process for the finite element analysis should include: (1) gravity, (2) advance-heave and advance-release, (3) tail void closure, (4) lining installation and activation and (5) long-term consolidation. Except for the factor of shield machine operation, the tail void closure is the major cause of ground movement in the sandy soil deposit. The initial stress, which heavily affects the result of finite element analysis, will change as the results of a shield machine advancing and passing a particular point along the tunnel alignment. This is in nature a three- dimensional problem. However, the cost of three-dimensional analysis with nonlinear soil behavior is simply prohibitive. A converting procedure was developed to simulate the heaving effects produced by the shield advancing process. Plane strain analysis rather than three-dimensional analysis was used in the simulation. An example analysis for an actual shield tunnel is presented for the complete modelling of the tunnelling process. The same procedure can be applied in the case where the tail void closure is the major cause of ground movement. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00465828
• Corporate Authors:

  Southeast Asian Geotechnical Society

  P.O. Box 2754
  Bangkok,   Thailand 
• Authors:
  • OU, C Y
  • CHERNG, J C
• Publication Date: 1995-6

Language

• English

Media Info

• Features: References;
• Pagination: p. 17-32
• Serial:
  • GEOTECHNICAL ENGINEERING
  • Volume: 26
  • Issue Number: 1
  • Publisher: SOUTHEAST ASIAN GEOTECHNICAL SOCIETY
  • ISSN: 0046-5828

Subject/Index Terms

• TRT Terms: Construction; Excavation; Excavations; Finite element method; Forecasting; Gravity; Ground settlement; Mathematical models; Sand; Shielding (Tunneling); Tunnels
• ITRD Terms: 3655: Construction; 5155: Excavation (process); 6490: Finite element method; 132: Forecast; 5419: Gravity; 6473: Mathematical model; 4105: Sand; 5792: Settlement; 3394: Shield driving; 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction;

Filing Info

• Accession Number: 00713457
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Nov 22 1995 12:00AM